IRVINE – Power has been restored to all 2,903 customers affected by a faulty underground cable that interrupted electrical service Saturday afternoon for up to 25 hours, officials said.

The last two Irvine customers that were still without power – commercial businesses in the city’s University Park neighborhood – had their service restored at 1:50 p.m. today, said Southern California Edison spokesman Paul Klein.

“We started moving customers to other circuits, but for customers closest to the actual problem, we have to turn their transformers off,” Klein said.

The power outage began at 12:43 p.m. Saturday, officials said.

John Wayne Airport lost power for about 20 minutes beginning at about 2:20 p.m. until a back-up generator kicked in, an airport spokeswoman said. The blackout delayed 11 flights by up to a half-hour.

Most of the Irvine customers had their electricity back within an hour, but about 600 had remained without power into Saturday night.